(1) pay, as they become due, the principal and interest on bonds and obligations of the Authority;
(2) establish and maintain such reserves as may be required to assure the payment of such principal and interest, as they become due;
(3) meet the cost of, and to provide for, the maintenance and operation of the housing projects, including necessary reserves therefor, and for costs of insurance protection, as well as the administrative expenses for the Authority; and
(4) make payments in lieu of taxes as provided for in this chapter.